In towing mode, the rear parking sensors are NOT activated when you select reverse gear or press the 
switch. This function may be unavailable if your towing bracket was not obtained from Audi Genuine Accessories or not fitted by an Audi dealer or a qualified workshop. The following general restrictions apply:
switch. This function may be unavailable if your towing bracket was not obtained from Audi Genuine Accessories or not fitted by an Audi dealer or a qualified workshop. The following general restrictions apply:Rear parking aid*
There is no rear distance warning.
parking system plus*
There is no rear distance warning. However, the system will still give a warning when obstacles are detected while driving forwards. The proximity graphic will switch over to towing mode.